Plumb-level.



No. 679,506. Patented July 30, 19m.

6. W. KRABILL.

PLUIIB LEVEL.

(Application filed Apr. 4, 1901.)

iv Z 0 M, 7 W 0 e G UNTTnD STATES PATENT OFFICE.

GEORGE WV. KRABILL, OF MILFORD, NEBRASKA, ASSIGNOR OF ONE-HALF TO PETERM. SMITH, OF CANTON, OHIO.

LEVEL.

SPECIFICATION forming' part of Letters Patent No. 679, dated July 1901-Application filed April 4, 1901.

To (tZZ whom it may concern.-

Be it known that I, GEORGE W. KRABILL, a citizen of the United States,residing at Milford, in the county of Seward and State of Nebraska, haveinvented certain new and useful Improvements in Plumb-Levels; and I dohereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making a part of this specification, and to the figures of referencemarked thereon, in which- Figure 1 is a view of the level, showing thedifferent parts properly connected. Fig. 2 is a side elevation showingaportion of the levelbody and the plate connected thereto. Fig. 3 is atransverse section on line a; a, Fig. 2. Fig. 4 is a detached view ofthe bob and its indicators or points. Fig. 5 is a transverse section ofthe bob. Fig. 6 is a perspective view of one of the side plates, showingparts broken away.

The present invention has relation to plumb-levels; and it consists inthe novel arrangement hereinafter d'escribed,and particularly pointedout in the claim.

Similar numerals of reference indicate corresponding parts in all thefigures of the drawllJgS.

In the accompanying drawings, 1 represents the level-bar, which ispreferably formed of wood and of any desired length and size, referencebeing had to convenience in handling. The bar 1 is provided at itscenter with the chamber 2, over which chamber are placed the side plates3, said side plates being formed alike and not connected to the bar 1 bysuitable wood screws or their equivalents. The plates 3 are eachprovided with the curved slots or openings 4, over which is located thescaled portion 5, said scaled portions being formed integral with theplates 3 by bending said plates inward or at right angles to the plateproper and then downward, as illustrated at 6, Fig. 6.

The bob 7 is substantially of the form shown Serial No. 54 266. (Nomodel.)

and is provided with a chamber 8, said chamber being shown at its bottomor lower end with a cap-screw 9.

To the bob 7 are attached the indicators or pointers 9, said pointersbeing pivotally mounted upon the lugs 10 and are held in proper positionwith reference to the bob 7 by means of the screws 11. For the purposeof properly adjusting the pointers 9 they are each provided with theslots 12, through which slots the screws 11 are passed and said screwsseated in the bob 7.

The object and purpose of pivotally attaching the pointers 9 is toprovide a means for bringing said pointers into true adjustment withreference to the scales 13 or, in other words, have the pointersindicate no degrees when the bob is at rest, it being understood thatthe bar 1 when the pointers indicate no degrees is to be in a truehorizontal position or, in other words, in a level position.

For the purpose of preventing the bob from swinging or oscillating for aconsiderable length of time the chamber 8 is partially filled withmercury, by which arrangement the bob is quickly brought at rest. Itwill be understood that the chamber 8 should be only partially filledwith mercury, so that the mercury will have an opportunity to move inthe chamber with the oscillations of the bob; but by the movement of themercury the bob is quickly brought to rest.

For the purpose of providing pivotal points for the bob 7 to swing uponthe pointed screws 14 are provided, said pointed screws being connectedto the plates 3 by means of the screw-threaded apertures 15. It will beunderstood that the screws 14 should be so adjusted that the bob 7 willbe free to turn upon the pointed screws 14:, the sockets 16 being formedin the lugs 10 to receive the pointed ends of the screws 14.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination of a bar provided with a chamber, plates located uponthe sides of the I pointers and seated in the bob, all arranged, 1ochamber and provided with o curved. slots .or substantially as and forthe purpose specified. openings, and scaled portions located at the Intestimony that I claim the above I have sides of the openings in theplates, a chamhereunto subscribed my name in the presence bered bobpivotally connected to the plates of two witnesses.

and provided with mercury, indicators or r GEORGE W. KRABILL. pointerspivotaily attached to side lugs formed Witnesses:

upon the bob and provided with slots and (J. A. HEGGELUND,

screws passed through the slots formed in the B. OVERHOLTS.

